EP0260446B1 - Geformter Zahnwurzelstift - Google Patents

Geformter Zahnwurzelstift Download PDF

Info

Publication number
EP0260446B1
EP0260446B1 EP87111821A EP87111821A EP0260446B1 EP 0260446 B1 EP0260446 B1 EP 0260446B1 EP 87111821 A EP87111821 A EP 87111821A EP 87111821 A EP87111821 A EP 87111821A EP 0260446 B1 EP0260446 B1 EP 0260446B1
Authority
EP
European Patent Office
Prior art keywords
pin
dental post
dental
post according
tooth stub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87111821A
Other languages
English (en)
French (fr)
Other versions
EP0260446A1 (de
Inventor
Bernard Weissmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coltene Whaledent Inc
Original Assignee
Coltene Whaledent Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coltene Whaledent Inc filed Critical Coltene Whaledent Inc
Publication of EP0260446A1 publication Critical patent/EP0260446A1/de
Application granted granted Critical
Publication of EP0260446B1 publication Critical patent/EP0260446B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/225—Fastening prostheses in the mouth
    • A61C13/30—Fastening of peg-teeth in the mouth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/30—Securing inlays, onlays or crowns
    • A61C5/35—Pins; Mounting tools or dispensers therefor

Definitions

  • Such helical flutes can be provided in a sequence with designated flutes being deeper than alternating shallower flutes. The use of such flutes can eliminate the need of the axial vent. Improvements in the retention capabilities of dental posts are also described in U.S. 4,571,187 assigned to the assignee of the present invention including an angled tang at the upper end of the post with projecting angular ribs about the tang to improve dental retention.
  • This object can be achieved by a dental post according to the first part of claim 1 by the characterizing features of the second part of claim 1.
  • a further object of the present invention is to provide a dental post having improved retention capabilities within a cement prepared bore within a tooth stub.
  • Another object of the present invention is to provide a dental post having helical grooves and annular ledges both of which are formed during a single rolling operation, which provides additional hardness to the dental post during the working of the post.
  • the helical grooves and the longitudinal contour are both formed during a rolling operation.
  • Such rolling operation also serves to increase the strength of the dental post as a result of the work hardening process.
  • the grooves or flute lines, 26, 28 provide retention of the dental post in the cement prepared tooth bore. Specifically, the cement itself lodges within the V-shaped grooves or flute lines and retains the post in place.
  • the post 10 also has an axial contour along its entire length.
  • the contour can be better noted in Figure 5 where the contour is shown without the presence of the grooves or flutes.
  • the peripheral contour is such to provide a plurality of inwardly tapered sections 30 interspaced by annular bands 32.
  • These ledges 34 are annular and are uniformally spaced apart along the entire axial length of the pin 10.
  • the upper end 36 as shown in Figure 5 shows the initial cylindrical pin portion prior to its being flattened and angularly bent into the tang shown on Figure 1.
  • the depth of the grooves is such that the depth of the larger grooves 26 is greater than the radial width of the annular shelf or ledge 34.
  • the depth of the shallower grooves 28 is less than the radial width of the annular shelf or ledge 34.
  • the larger grooves or flutes 26 extend entirely around the periphery along both the wider bands 32 as well as across the tapering sections 30.
  • the depth of the shallower grooves 28 is less than the radial length of the annular ledge so that it tends to fade or disappear along the tapering portion 30.
  • the edge of the shallow groove 28 terminates at a point 38 somewhere along the length of the tapered section 30.
  • the presence of the shelves or ledges 34 are significant in improving the torque resistance to dislocation of the pin within the cement prepared bore.
  • the ledges provide for deep axial lengths of cement sections which are provided as blocks around the periphery of the post to further secure it in place. Tests on the post of the present invention have shown a substantial increase in retention strength of the post within the cement prepared bore.
  • a tooth stub 40 within the gum area 42 where the upper end of the tooth has been broken.
  • the tooth has been initially cut down, typically to provide a suitable upper surface 44.
  • a retaining member such as the dental post of the present invention.
  • the upper end tang 16 of the post 10 extends upwardly above the surface 44 of the tooth stub.
  • a superstructure 52 can then be suitably formed onto the tooth stub in accordance with standard well known techniques in the dental line. The superstructure 52 is retained onto the upper end 16 of the dental post 10 and remains securely in place thereby.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dental Prosthetics (AREA)

Claims (18)

  1. Zahnwurzelstift zur sicheren Verankerung eines Zahnersatzstückes (52) auf einem präparierten Zahnstumpf (40), mit einem länglichen, zylindrischen Stift (12) zur Befestigung innerhalb des Zahnstumpfes, wobei der zylindrische Stift eine Längsachse und mehrere in Längsrichtung abgeschrägte Abschnitte (30) aufweist, die entlang der Achse angeordnet sind, und mit schraubenartigen Nuten (24), die um den Umfang des Stiftes (12) zu dessen Halterung angeordnet sind, wobei der Stift (12) innerhalb einer mit Zement (50) präparierten Bohrung (48) in einem Zahnstumpf (40) befestigt ist, dadurch gekennzeichnet,
    daß jeder der Abschnitte in Richtung eines Aufnahmeendes (14) des Stiftes in dem Zahnstumpf abgeschrägt ist und eine ringförmige, sich radial erstreckende Schulter (34) umfaßt, die jeden abgeschrägten Abschnitt von dem daran anschließenden abgeschrägten Abschnitt trennt, um den Stift (12) innerhalb eines eine Bohrung in dem Zahnstumpf (40) füllenden Zementes zu verankern.
  2. Zahnwurzelstift nach Anspruch 1, gekennzeichnet durch schraubenartige Nuten (24, 26, 28), die um den Umfang des Stiftes (12) zur weiteren Verankerung des Stiftes innerhalb des Zahnstumpfes angeordnet sind und durch abgeschrägte Abschnitte, die ringförmige Rinnen (34) an den Schultern aufweisen.
  3. Zahnwurzelstift nach Anspruch 2, dadurch gekennzeichnet,
    daß die ringförmigen Rinnen längs des Stiftes (12) gleichförmig voneinander beabstandet angeordnet sind.
  4. Zahnwurzelstift nach Anspruch 2, dadurch gekennzeichnet,
    daß jeder der abgeschrägten Abschnitte (30) an seinem oberen Ende einen zylindrischen Abschnitt aufweist (32), der in der Schulter endet.
  5. Zahnwurzelstift nach Anspruch 4, dadurch gekennzeichnet,
    daß der zylindrische Abschnitt (32) jedes abgeschrägten Abschnittes (30) der äußeren Umfangskante des Stiftes (12) entspricht.
  6. Zahnwurzelstift nach Anspruch 5, dadurch gekennzeichnet,
    daß wenigstens einige der schraubenartigen Nuten (24, 26, 28) die zylindrischen Abschnitte (32) durchdringen.
  7. Zahnwurzelstift nach Anspruch 2, dadurch gekennzeichnet,
    daß wenigstens einige der schraubenartigen Nuten (24, 26, 28) längs der abgeschrägten Abschnitte (30) schwinden.
  8. Zahnwurzelstift nach Anspruch 2, dadurch gekennzeichnet,
    daß wenigstens einige der schraubenartigen Nuten (24, 28) geringere Tiefe aufweisen als die Tiefe der ringförmigen Rinnen (34).
  9. Zahnwurzelstift nach Anspruch 2, dadurch gekennzeichnet,
    daß die schraubenartigen Nuten eine erste Gruppe Nuten (24, 26) mit einer geringeren Tiefe als die Tiefe der ringförmigen Rinnen (34) ausbilden und eine zweite Gruppe von Nuten (24, 28), die in Folge mit der ersten Gruppe Nuten (24, 26) abwechseln und eine geringere Tiefe aufweisen, als die Tiefe der ringförmigen Rinnen (34).
  10. Zahnwurzelstift nach Anspruch 2, gekennzeichnet durch ein Kopfteil (16, 36), das sich derart von dem Stift (12) erstreckt, daß es nach außen aus dem Zahnstumpf (40), auf dem das Zahnersatzstück befestigt werden kann, wenn der Stift (12) in die Bohrung des Zahnstumpfes (48) eingeführt ist, herausragt.
  11. Zahnwurzelstift nach Anspruch 10, dadurch gekennzeichnet,
    daß das Kopfteil (16, 36) eine mit dem Stift (12) integral ausgebildete abgeplattete Bohrerangel (16) aufweist.
  12. Zahnwurzelstift nach Anspruch 11, dadurch gekennzeichnet,
    daß die Bohrerangel (16) unter einem Winkel in Bezug auf die Achse des Stiftes (12) ausgerichtet ist.
  13. Zahnwurzelstift nach Anspruch 1, dadurch gekennzeichnet,
    daß der Stift (12) an seinem Aufnahmeende einen unteren Endabschnitt (14) aufweist, dessen Durchmesser im wesentlichen gleich dem Außenumfangsdurchmesser des Stiftes (12) ist.
  14. Verfahren zur Ausbildung eines Zahnwurzelstiftes zur Befestigung einer dentalen prothetischen Einrichtung (52) auf einem präparierten Zahnstumpf (40), gekennzeichnet durch die Schritte:
    Auswalzen mehrerer sich in Längsrichtung erstreckender abgeschrägter Abschnitte (30) in Richtung eines Aufnahmeendes längs der Oberfläche eines Stiftes (12) und
    Ausbilden von schraubenartigen Nuten (24, 26, 28) um den Umfang des Stiftes.
  15. Verfahren nach Anspruch 14, dadurch gekennzeichnet,
    daß der Schritt des Ausbildens das Auswalzen der schraubenartigen Nuten (24, 26, 28) umfaßt.
  16. Verfahren nach Anspruch 15, dadurch gekennzeichnet,
    daß die schraubenartigen Nuten (24, 26, 28) und die abgeschrägten Abschnitte (30) zusammen in einem einzigen Auswalzvorgang ausgebildet werden.
  17. Verfahren nach Anspruch 16, dadurch gekennzeichnet,
    daß die axiale Länge des Stiftes (12) während des Auswalzvorganges verlängert wird.
  18. Verfahren nach Anspruch 16, dadurch gekennzeichnet,
    daß die abgeschrägten Abschnitte (30) in Längsrichtung voneinander beabstandete, im wesentlichen radiale Ränder (34) entlang der Länge des Stiftes (12) ausbilden.
EP87111821A 1986-09-08 1987-08-14 Geformter Zahnwurzelstift Expired - Lifetime EP0260446B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US904205 1986-09-08
US06/904,205 US4729736A (en) 1986-09-08 1986-09-08 Contoured dental posts

Publications (2)

Publication Number Publication Date
EP0260446A1 EP0260446A1 (de) 1988-03-23
EP0260446B1 true EP0260446B1 (de) 1992-03-04

Family

ID=25418767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111821A Expired - Lifetime EP0260446B1 (de) 1986-09-08 1987-08-14 Geformter Zahnwurzelstift

Country Status (6)

Country Link
US (1) US4729736A (de)
EP (1) EP0260446B1 (de)
JP (1) JPH0817784B2 (de)
CA (1) CA1279510C (de)
DE (1) DE3777035D1 (de)
ES (1) ES2030025T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9089384B1 (en) 2013-05-21 2015-07-28 Austin H. Sampson Dental pin system

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932870A (en) * 1988-08-18 1990-06-12 Ipco Corporation Dental post and method for making the same
GB8826823D0 (en) * 1988-11-16 1988-12-21 Filhol Stuart J Dental equipment & method
AU4463689A (en) * 1988-11-16 1990-05-24 Stuart Julian Filhol Dental equipment and method
US4990090A (en) * 1988-11-18 1991-02-05 Roane James B Endodontic post construction
US5145373A (en) * 1989-02-09 1992-09-08 Roane James B Endodontic post
US5035620A (en) * 1989-02-09 1991-07-30 Roane James B Endodontic post with spiral groove
GB9122295D0 (en) * 1991-10-21 1991-12-04 Filhol Stuart J Dental pin assembly
US5284443A (en) * 1992-08-28 1994-02-08 Coltene/Whaledent, Inc. Method of forming dental restorations
US5275563A (en) * 1992-09-02 1994-01-04 Essential Dental Systems, Inc. Dental post extracting drill
US5820375A (en) * 1996-07-16 1998-10-13 Wellesley Research Associates, Inc. Dental post having cutting and non-cutting surfaces
US6186791B1 (en) 1998-08-11 2001-02-13 Jeneric/Pentron Incorporated Fiber reinforced composite post
US7488175B2 (en) * 1998-08-11 2009-02-10 Pentron Clinical Technologies, Llc Fiber reinforced composite post
JP3675259B2 (ja) * 1999-11-12 2005-07-27 愛知製鋼株式会社 義歯アタッチメント用のキーパ
WO2005087132A1 (es) * 2004-02-19 2005-09-22 Enrique Kogan Frenk Poste intra radicular para reconstrucción de dientes con tratamiento de conductos
DE102005021807B3 (de) * 2005-05-04 2006-11-30 Universität Rostock Isoelastischer Endodontiestift
DK2281524T3 (da) 2009-08-05 2013-02-11 Peter E Nordin Tandstolpe
DOP2015000272A (es) * 2015-11-05 2017-05-31 Edgardo Feliz Matos Leandro Perno intrarradicular ancla
TWM549054U (zh) * 2017-06-05 2017-09-21 Chung-Chih Tseng 贋復補綴復型裝置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US313737A (en) * 1885-03-10 Artificial
US2536669A (en) * 1947-07-29 1951-01-02 Thau-Jensen Orla Root pin for use in reinforcement in lays, cast crowns, and pivot teeth
FR2063993B1 (de) * 1969-10-22 1975-11-07 Scialom Jacques
FR2395738A1 (fr) * 1977-07-01 1979-01-26 Bouet Bernard Prisonnier amovible a l'usage notamment d'implant dentaire
US4268253A (en) * 1979-12-26 1981-05-19 Gross Michael J Dowel post for dental and medical prosthetic devices
US4293302A (en) * 1980-03-26 1981-10-06 Scientific Advances, Inc. Tooth implants
GB2117641B (en) * 1982-03-24 1985-03-27 Winter Moore Peter Howard Dental post assembly
US4571187A (en) * 1983-04-29 1986-02-18 Ipco Corporation Dental post for retention of a prosthetic superstructure
US4479783A (en) * 1983-04-29 1984-10-30 Ipco Corporation Helically fluted dental post

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9089384B1 (en) 2013-05-21 2015-07-28 Austin H. Sampson Dental pin system

Also Published As

Publication number Publication date
EP0260446A1 (de) 1988-03-23
CA1279510C (en) 1991-01-29
US4729736A (en) 1988-03-08
DE3777035D1 (de) 1992-04-09
JPH0817784B2 (ja) 1996-02-28
JPS63153058A (ja) 1988-06-25
ES2030025T3 (es) 1992-10-16

Similar Documents

Publication Publication Date Title
EP0260446B1 (de) Geformter Zahnwurzelstift
EP0536386B1 (de) Dentalstift mit intermittierendem gewinde
US4917606A (en) Threaded dental anchor
US6386877B1 (en) Implant for holding and/or forming a dental prosthesis or artificial finger joint
EP2662052B1 (de) Zahnimplantat und Kit mit dem Zahnimplantat
US6315564B1 (en) Bone implant
US4767332A (en) Threaded dental anchor
US4479783A (en) Helically fluted dental post
JP2016503666A (ja) 凝縮インプラント
US4268253A (en) Dowel post for dental and medical prosthetic devices
US5145373A (en) Endodontic post
EP0806916B1 (de) Gesplitzter gewindebohrer und lentulo-bohrer für zahnwurzelstift-system
EP0455727A4 (en) Dental anchor and drill for use therewith
US4408990A (en) Endodontic dental implant
AU4220489A (en) Dental post and method for making the same
US5035620A (en) Endodontic post with spiral groove
US6406296B1 (en) Implant with enlarged proximal segment
EP0026246B1 (de) Stift zur Verankerung einer zahnärztlichen oder medizinischen prothetischen Vorrichtung
WO1999060945A1 (en) Assembly of drills for forming a hole in a tooth root and method for placing a canal post in a tooth root
CA1251065A (en) Threaded dental anchor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19880921

17Q First examination report despatched

Effective date: 19900130

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: COLTENE/WHALEDENT, INC.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920304

Ref country code: CH

Effective date: 19920304

Ref country code: LI

Effective date: 19920304

REF Corresponds to:

Ref document number: 3777035

Country of ref document: DE

Date of ref document: 19920409

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EN Fr: translation not filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2030025

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 87111821.2

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20050826

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20060825

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060831

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20061002

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20070816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20070813

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20070816

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20060829

Year of fee payment: 20